Justsaws
Addicted to ArboristSite
Trust me, I've tried everything! Actually, I can run the H needle all the way in and it doesn't run a bit differently. I didn't mean to hold that bit of info from you guys. I've just tried so many things it's hard to remember.
If you can seat both needles without any change then it is time to dump that carb and get a different one. If I was you I would get a new one unless the used one is returnable if non-functioning. Lots of folks have buckets of used crap carbs and many of them find their way to EBay.
I have had a lot of 020AVs and have yet to get one with a crapped out carb but the dealer I used to get parts from had a bunch. I was going to cast them into a hammer to whack 020s with but he declined.